/*
    GNU LESSER GENERAL PUBLIC LICENSE
    Copyright (C) 2006 The Lobo Project

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Contact info: xamjadmin@users.sourceforge.net
*/
package org.lobobrowser.html.domimpl;

import org.lobobrowser.html.style.FontSizeRenderState;
import org.lobobrowser.html.style.RenderState;

/**
 * This element is used for SMALL and BIG.
 */
public class HTMLFontSizeChangeElementImpl extends HTMLAbstractUIElement {
	private final int fontChange;
	
	public HTMLFontSizeChangeElementImpl(String name, int fontChange) {
		super(name);
		this.fontChange = fontChange;
	}

	protected RenderState createRenderState(RenderState prevRenderState) {
		int fontSize;
		if(prevRenderState == null) {
			fontSize = 13;
		}
		else {
			fontSize = prevRenderState.getFont().getSize();
			fontSize += (this.fontChange * 2);
			if(fontSize < 1) {
				fontSize = 1;
			}
		}
		prevRenderState = new FontSizeRenderState(prevRenderState, fontSize);
		return super.createRenderState(prevRenderState);
	}
}
